
BMW 8 Series Convertible (G14)
Car comparison
Compare specs, acceleration, fuel consumption, dimensions, practicality, and estimated running costs side by side.
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BMW 8 Series Convertible (G14)

BMW 8 Series Convertible (G14)

BMW 8 Series Convertible (G14)

BMW 8 Series Convertible (G14)
Use the estimates as comparison hints and verify exact figures before making decisions.
| Model | BMW8 Series Convertible (G14)840i (Stage 3)510 hp | BMW8 Series Convertible (G14)840i (Stage 2)442 hp | BMW8 Series Convertible (G14)840i (Stage 1)401 hp | BMW8 Series Convertible (G14)840i340 hp |
|---|---|---|---|---|
| Power | 510hp380kW+170 hp | 442hp330kW+102 hp | 401hp299kW+61 hp | 340hp254kW |
| Torque | 775Nm572lb-ft+275 Nm | 675Nm498lb-ft+175 Nm | 610Nm450lb-ft+110 Nm | 500Nm369lb-ft |
| Curb weight | 1,830kg4,034lb | 1,830kg4,034lb | 1,830kg4,034lb | 1,830kg4,034lb |
| Gross weight | 2,340kg5,159lb | 2,340kg5,159lb | 2,340kg5,159lb | 2,340kg5,159lb |
| Top speed | 292 km/h 181 mph | Unrestricted 290 km/h180 mph Restricted 280 km/h174 mph Calculated | 273 km/h 170 mph | Unrestricted 260 km/h162 mph Restricted 250 km/h155 mph Calculated |
| To 99% top speed | 58.3s99% target: 289 km/h / 180 mph-15.7 s Calculated | 67.1s99% target: 287 km/h / 178 mph-6.8 s Calculated | 67.8s99% target: 270 km/h / 168 mph-6.1 s Calculated | 73.9s99% target: 257 km/h / 160 mph Calculated |
| 0-100 km/h | 4.1s-1.2 s | 4.5s-0.8 s | 4.8s-0.5 s | 5.3s |
| 0-200 km/h | 12.6s-6.7 s Calculated | 14.2s-5.1 s Calculated | 16.2s-3.2 s Calculated | 19.4s Calculated |
| 0-60 mph | 3.9s-1.1 s Calculated | 4.3s-0.7 s Calculated | 4.5s-0.5 s Calculated | 5.0s Calculated |
| Fuel consumption | 7.5L/100 km31.4mpg US37.7mpg UK | 7.5L/100 km31.4mpg US37.7mpg UK | 7.5L/100 km31.4mpg US37.7mpg UK | 7.5L/100 km31.4mpg US37.7mpg UK |
| Fuel consumption city | 9.3L/100 km25.3mpg US30.4mpg UK | 9.3L/100 km25.3mpg US30.4mpg UK | 9.3L/100 km25.3mpg US30.4mpg UK | 9.3L/100 km25.3mpg US30.4mpg UK |
| Fuel consumption highway | 6.4L/100 km36.8mpg US44.1mpg UK | 6.4L/100 km36.8mpg US44.1mpg UK | 6.4L/100 km36.8mpg US44.1mpg UK | 6.4L/100 km36.8mpg US44.1mpg UK |
| Quarter mile | 12.0s-1.4 s Calculated | 12.5s-1.0 s Calculated | 12.9s-0.6 s Calculated | 13.4s Calculated |
| Power-to-weight | 279hp/t208kW/t126hp/1000 lb Calculated | 242hp/t180kW/t110hp/1000 lb Calculated | 219hp/t163kW/t99hp/1000 lb Calculated | 186hp/t139kW/t84hp/1000 lb Calculated |
| Torque-to-weight | 423Nm/t283lb-ft/ton Calculated | 369Nm/t247lb-ft/ton Calculated | 333Nm/t223lb-ft/ton Calculated | 273Nm/t183lb-ft/ton Calculated |
| Estimated range | 907km563mi Calculated | 907km563mi Calculated | 907km563mi Calculated | 907km563mi Calculated |
| Displacement | 2,998cc183cu in | 2,998cc183cu in | 2,998cc183cu in | 2,998cc183cu in |
| Length | 4,843mm191in | 4,843mm191in | 4,843mm191in | 4,843mm191in |
| Width | 1,902mm75in | 1,902mm75in | 1,902mm75in | 1,902mm75in |
| Height | 1,339mm53in | 1,339mm53in | 1,339mm53in | 1,339mm53in |
| Wheelbase | 2,822mm111in | 2,822mm111in | 2,822mm111in | 2,822mm111in |
| Front track | 1,627mm64in | 1,627mm64in | 1,627mm64in | 1,627mm64in |
| Rear track | 1,642mm65in | 1,642mm65in | 1,642mm65in | 1,642mm65in |
| Ground clearance | 118mm5in | 118mm5in | 118mm5in | 118mm5in |
| Trunk volume | 280L | 280L | 280L | 280L |
| Max trunk volume | 350L | 350L | 350L | 350L |
| Doors | 2 | 2 | 2 | 2 |
| Seats | 4 | 4 | 4 | 4 |
| Fuel tank | 68L | 68L | 68L | 68L |
Use the estimates as comparison hints and verify exact figures before making decisions.
Estimated stock-style power and torque curves by engine speed.
| Vehicle | Peak power RPM | Peak torque RPM | Max engine speed |
|---|---|---|---|
| BMW8 Series Convertible (G14)840i (Stage 3)510 hp | 5,000-6,500 rpm | 1,600-4,500 rpm | 6,750 rpm |
| BMW8 Series Convertible (G14)840i (Stage 2)442 hp | 5,000-6,500 rpm | 1,600-4,500 rpm | 6,750 rpm |
| BMW8 Series Convertible (G14)840i (Stage 1)401 hp | 5,000-6,500 rpm | 1,600-4,500 rpm | 6,750 rpm |
| BMW8 Series Convertible (G14)840i340 hp | 5,000-6,500 rpm | 1,600-4,500 rpm | 6,750 rpm |
Estimated speed over time for selected vehicles.
| Metric | BMW8 Series Convertible (G14)840i (Stage 3)510 hp | BMW8 Series Convertible (G14)840i (Stage 2)442 hp | BMW8 Series Convertible (G14)840i (Stage 1)401 hp | BMW8 Series Convertible (G14)840i340 hp |
|---|---|---|---|---|
| Acceleration checkpoints | ||||
0-60 mph 0-97 km/h | 3.9 s | 4.3 s | 4.5 s | 5.0 s |
0-100 km/h 0-62 mph | 4.1 s | 4.5 s | 4.8 s | 5.3 s |
0-200 km/h 0-124 mph | 12.6 s | 14.2 s | 16.2 s | 19.4 s |
| Top speed | 292 km/h 181 mph | Unrestricted 290 km/h180 mph Restricted 280 km/h174 mph Likely limited | 273 km/h 170 mph | Unrestricted 260 km/h162 mph Restricted 250 km/h155 mph Likely limited |
| Drag race simulation | ||||
60 ft 18 m | 2.1 s | 2.1 s | 2.1 s | 2.2 s |
330 ft 101 m | 5.3 s | 5.5 s | 5.6 s | 5.8 s |
1/8 mile 201 m | 7.9 s | 8.2 s | 8.4 s | 8.8 s |
1000 ft 305 m | 10.2 s | 10.6 s | 10.8 s | 11.3 s |
1/4 mile 402 m | 12.0 s | 12.5 s | 12.9 s | 13.4 s |
Trap speed 1/4 mile 402 m | 195 km/h 121 mph | 188 km/h 117 mph | 180 km/h 112 mph | 171 km/h 106 mph |
Bar comparison chart for Power. Higher is better · hp / kW
| Vehicle | Value |
|---|---|
| BMW8 Series Convertible (G14)840i (Stage 3)510 hp | 510 hp 380 kW |
| BMW8 Series Convertible (G14)840i (Stage 2)442 hp | 442 hp 330 kW |
| BMW8 Series Convertible (G14)840i (Stage 1)401 hp | 401 hp 299 kW |
| BMW8 Series Convertible (G14)840i340 hp | 340 hp 254 kW |
BMW 8 Series Convertible (G14) 840i (Stage 3) 510 hp has 170 hp more than BMW 8 Series Convertible (G14) 840i 340 hp.
The biggest power difference is between BMW 8 Series Convertible (G14) 840i 340 hp and BMW 8 Series Convertible (G14) 840i (Stage 3) 510 hp: 170 hp (127 kW).
Bar comparison chart for Torque. Higher is better · Nm / lb-ft
| Vehicle | Value |
|---|---|
| BMW8 Series Convertible (G14)840i (Stage 3)510 hp | 775 Nm 572 lb-ft |
| BMW8 Series Convertible (G14)840i (Stage 2)442 hp | 675 Nm 498 lb-ft |
| BMW8 Series Convertible (G14)840i (Stage 1)401 hp | 610 Nm 450 lb-ft |
| BMW8 Series Convertible (G14)840i340 hp | 500 Nm 369 lb-ft |
Bar comparison chart for Curb weight. Lower is better · kg / lb
| Vehicle | Value |
|---|---|
| BMW8 Series Convertible (G14)840i (Stage 3)510 hp | 1,830 kg 4,034 lb |
| BMW8 Series Convertible (G14)840i (Stage 2)442 hp | 1,830 kg 4,034 lb |
| BMW8 Series Convertible (G14)840i (Stage 1)401 hp | 1,830 kg 4,034 lb |
| BMW8 Series Convertible (G14)840i340 hp | 1,830 kg 4,034 lb |
Bar comparison chart for Top speed without limiter. Higher is better · km/h / mph
| Vehicle | Value |
|---|---|
| BMW8 Series Convertible (G14)840i (Stage 3)510 hp | 292 km/h 181 mph |
| BMW8 Series Convertible (G14)840i (Stage 2)442 hp | Unrestricted 290 km/h180 mph Restricted 280 km/h174 mph |
| BMW8 Series Convertible (G14)840i (Stage 1)401 hp | 273 km/h 170 mph |
| BMW8 Series Convertible (G14)840i340 hp | Unrestricted 260 km/h162 mph Restricted 250 km/h155 mph |
Bar comparison chart for 0-100 km/h. Lower is better · seconds
| Vehicle | Value |
|---|---|
| BMW8 Series Convertible (G14)840i (Stage 3)510 hp | 4.1 s |
| BMW8 Series Convertible (G14)840i (Stage 2)442 hp | 4.5 s |
| BMW8 Series Convertible (G14)840i (Stage 1)401 hp | 4.8 s |
| BMW8 Series Convertible (G14)840i340 hp | 5.3 s |
The biggest 0-100 km/h difference is between BMW 8 Series Convertible (G14) 840i (Stage 3) 510 hp and BMW 8 Series Convertible (G14) 840i 340 hp: 1.2 s.
The closest cars by acceleration are BMW 8 Series Convertible (G14) 840i (Stage 2) 442 hp and BMW 8 Series Convertible (G14) 840i (Stage 1) 401 hp, separated by only 0.3 s.
Bar comparison chart for Fuel consumption. Lower is better · L/100 km / mpg US / mpg UK
| Vehicle | Value |
|---|---|
| BMW8 Series Convertible (G14)840i (Stage 3)510 hp | 7.5 L/100 km 31.4 mpg US 37.7 mpg UK |
| BMW8 Series Convertible (G14)840i (Stage 2)442 hp | 7.5 L/100 km 31.4 mpg US 37.7 mpg UK |
| BMW8 Series Convertible (G14)840i (Stage 1)401 hp | 7.5 L/100 km 31.4 mpg US 37.7 mpg UK |
| BMW8 Series Convertible (G14)840i340 hp | 7.5 L/100 km 31.4 mpg US 37.7 mpg UK |
Bar comparison chart for Power-to-weight. Higher is better · hp/t / kW/t
| Vehicle | Value |
|---|---|
| BMW8 Series Convertible (G14)840i (Stage 3)510 hp | 279 hp/t 208 kW/t 3.6 kg/hp |
| BMW8 Series Convertible (G14)840i (Stage 2)442 hp | 242 hp/t 180 kW/t 4.1 kg/hp |
| BMW8 Series Convertible (G14)840i (Stage 1)401 hp | 219 hp/t 163 kW/t 4.6 kg/hp |
| BMW8 Series Convertible (G14)840i340 hp | 186 hp/t 139 kW/t 5.4 kg/hp |
Bar comparison chart for Estimated range. Higher is better · km / mi
| Vehicle | Value |
|---|---|
| BMW8 Series Convertible (G14)840i (Stage 3)510 hp | 907 km 563 mi |
| BMW8 Series Convertible (G14)840i (Stage 2)442 hp | 907 km 563 mi |
| BMW8 Series Convertible (G14)840i (Stage 1)401 hp | 907 km 563 mi |
| BMW8 Series Convertible (G14)840i340 hp | 907 km 563 mi |
Radar chart comparing normalized performance and fuel-consumption scores.
| Vehicle | Power | Acceleration | Top speed |
|---|---|---|---|
| BMW8 Series Convertible (G14)840i (Stage 3)510 hp | 510 hp 380 kW | 4.1 s | 292 km/h 181 mph |
| BMW8 Series Convertible (G14)840i (Stage 2)442 hp | 442 hp 330 kW | 4.5 s | Unrestricted 290 km/h180 mph Restricted 280 km/h174 mph |
| BMW8 Series Convertible (G14)840i (Stage 1)401 hp | 401 hp 299 kW | 4.8 s | 273 km/h 170 mph |
| BMW8 Series Convertible (G14)840i340 hp | 340 hp 254 kW | 5.3 s | Unrestricted 260 km/h162 mph Restricted 250 km/h155 mph |
Scatter chart with performance score on the X axis and practicality score on the Y axis.
| Vehicle | Performance score | Practicality score | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| BMW8 Series Convertible (G14)840i (Stage 3)510 hp |
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| BMW8 Series Convertible (G14)840i (Stage 2)442 hp |
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| BMW8 Series Convertible (G14)840i (Stage 1)401 hp |
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| BMW8 Series Convertible (G14)840i340 hp |
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Cars closer to the top-right corner combine stronger performance with better fuel economy scores.
| Vehicle | Performance score | Fuel economy score | ||||||
|---|---|---|---|---|---|---|---|---|
| BMW8 Series Convertible (G14)840i (Stage 3)510 hp |
| 7.5 L/100 km 31.4 mpg US 37.7 mpg UK | ||||||
| BMW8 Series Convertible (G14)840i (Stage 2)442 hp |
| 7.5 L/100 km 31.4 mpg US 37.7 mpg UK | ||||||
| BMW8 Series Convertible (G14)840i (Stage 1)401 hp |
| 7.5 L/100 km 31.4 mpg US 37.7 mpg UK | ||||||
| BMW8 Series Convertible (G14)840i340 hp |
| 7.5 L/100 km 31.4 mpg US 37.7 mpg UK | ||||||
BMW 8 Series Convertible (G14) 840i (Stage 3) 510 hp is closest to the top-right balance target for performance and fuel economy.
Cars closer to the lower-left corner offer a better mix of quick acceleration and low fuel consumption.
| Vehicle | Fuel consumption, L/100 km | 0-100 km/h, s |
|---|---|---|
| BMW8 Series Convertible (G14)840i (Stage 3)510 hp | 7.5 L/100 km 31.4 mpg US 37.7 mpg UK | 4.1 s |
| BMW8 Series Convertible (G14)840i (Stage 2)442 hp | 7.5 L/100 km 31.4 mpg US 37.7 mpg UK | 4.5 s |
| BMW8 Series Convertible (G14)840i (Stage 1)401 hp | 7.5 L/100 km 31.4 mpg US 37.7 mpg UK | 4.8 s |
| BMW8 Series Convertible (G14)840i340 hp | 7.5 L/100 km 31.4 mpg US 37.7 mpg UK | 5.3 s |
The shaded area favors higher power-to-weight with lower combined fuel consumption.
| Vehicle | Power-to-weight, hp/t | Fuel consumption, L/100 km |
|---|---|---|
| BMW8 Series Convertible (G14)840i (Stage 3)510 hp | 279 hp/t 208 kW/t 3.6 kg/hp | 7.5 L/100 km 31.4 mpg US 37.7 mpg UK |
| BMW8 Series Convertible (G14)840i (Stage 2)442 hp | 242 hp/t 180 kW/t 4.1 kg/hp | 7.5 L/100 km 31.4 mpg US 37.7 mpg UK |
| BMW8 Series Convertible (G14)840i (Stage 1)401 hp | 219 hp/t 163 kW/t 4.6 kg/hp | 7.5 L/100 km 31.4 mpg US 37.7 mpg UK |
| BMW8 Series Convertible (G14)840i340 hp | 186 hp/t 139 kW/t 5.4 kg/hp | 7.5 L/100 km 31.4 mpg US 37.7 mpg UK |
| Vehicle | BMW8 Series Convertible (G14)840i (Stage 3)510 hp | BMW8 Series Convertible (G14)840i (Stage 2)442 hp | BMW8 Series Convertible (G14)840i (Stage 1)401 hp | BMW8 Series Convertible (G14)840i340 hp | ||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Power | 510 hp 380 kW | 442 hp 330 kW | 401 hp 299 kW | 340 hp 254 kW | ||||||||||||||||||||||||||||||||
| Torque | 775 Nm 572 lb-ft | 675 Nm 498 lb-ft | 610 Nm 450 lb-ft | 500 Nm 369 lb-ft | ||||||||||||||||||||||||||||||||
| Acceleration | 4.1 s | 4.5 s | 4.8 s | 5.3 s | ||||||||||||||||||||||||||||||||
| Top speed | 292 km/h 181 mph | Unrestricted 290 km/h180 mph Restricted 280 km/h174 mph | 273 km/h 170 mph | Unrestricted 260 km/h162 mph Restricted 250 km/h155 mph | ||||||||||||||||||||||||||||||||
| Lightness | 1,830 kg 4,034 lb | 1,830 kg 4,034 lb | 1,830 kg 4,034 lb | 1,830 kg 4,034 lb | ||||||||||||||||||||||||||||||||
| Fuel consumption | 7.5 L/100 km 31.4 mpg US 37.7 mpg UK | 7.5 L/100 km 31.4 mpg US 37.7 mpg UK | 7.5 L/100 km 31.4 mpg US 37.7 mpg UK | 7.5 L/100 km 31.4 mpg US 37.7 mpg UK | ||||||||||||||||||||||||||||||||
| Practicality |
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| Range score | 907 km 563 mi | 907 km 563 mi | 907 km 563 mi | 907 km 563 mi | ||||||||||||||||||||||||||||||||
| Trunk score | 280 L 9.9 cu ft | 280 L 9.9 cu ft | 280 L 9.9 cu ft | 280 L 9.9 cu ft | ||||||||||||||||||||||||||||||||
| Power-to-weight score | 279 hp/t 208 kW/t 3.6 kg/hp | 242 hp/t 180 kW/t 4.1 kg/hp | 219 hp/t 163 kW/t 4.6 kg/hp | 186 hp/t 139 kW/t 5.4 kg/hp | ||||||||||||||||||||||||||||||||
| Overall | Fixed score | Fixed score | Fixed score | Fixed score |
Estimate running costs from combined consumption, your annual distance, and the fuel price in your local currency.
Enter the fuel price in your local currency, for example €/L, $/gal, £/L or any other local currency.
LC = Local Currency
| Vehicle | BMW 8 Series Convertible (G14) 840i (Stage 3) 510 hp | BMW 8 Series Convertible (G14) 840i (Stage 2) 442 hp | BMW 8 Series Convertible (G14) 840i (Stage 1) 401 hp | BMW 8 Series Convertible (G14) 840i 340 hp |
|---|---|---|---|---|
| Consumption | 7.5 L/100 km31.4 mpg US37.7 mpg UK | 7.5 L/100 km31.4 mpg US37.7 mpg UK | 7.5 L/100 km31.4 mpg US37.7 mpg UK | 7.5 L/100 km31.4 mpg US37.7 mpg UK |
| Cost / 100 km | 13.13 LC100 km | 13.13 LC100 km | 13.13 LC100 km | 13.13 LC100 km |
| Cost / 100 mi | 21.12 LC100 mi | 21.12 LC100 mi | 21.12 LC100 mi | 21.12 LC100 mi |
| Annual fuel used | 1,125 L297 US gal247 UK gal | 1,125 L297 US gal247 UK gal | 1,125 L297 US gal247 UK gal | 1,125 L297 US gal247 UK gal |
| Annual fuel cost | 1,969 LC/year | 1,969 LC/year | 1,969 LC/year | 1,969 LC/year |
Pros
No measurable advantages in the available data.























